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Add exception for illegal types for conversion functions with -OrZero or -OrNull postfixes.

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Add docs for conversion functions with -OrZero and -OrNull postfixes.
This commit is contained in:
akonyaev 2019-11-21 18:46:25 +03:00
parent 6d3379cbbd
commit 78f13839ac
3 changed files with 68 additions and 2 deletions
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14
dbms/src/Functions/FunctionsConversion.h
View File

@ -971,8 +971,18 @@ public:
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
if (!isStringOrFixedString(arguments[0].type))
throw Exception("Illegal type " + arguments[0].type->getName() + " of first argument of function " + getName(),
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
{
if (this->getName().find("OrZero") != std::string::npos ||
this->getName().find("OrNull") != std::string::npos)
throw Exception(
"Illegal type " + arguments[0].type->getName() + " of first argument of function " + getName() +
". Conversion functions with postfix 'OrZero' or 'OrNull' should take String argument",
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
else
throw Exception(
"Illegal type " + arguments[0].type->getName() + " of first argument of function " + getName(),
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
}
if (arguments.size() == 2)
{

28
docs/en/query_language/functions/type_conversion_functions.md
View File

@ -40,8 +40,36 @@ SELECT toInt64(nan), toInt32(32), toInt16('16'), toInt8(8.8)
## toInt(8|16|32|64)OrZero
It takes an argument of type String and tries to parse it into Int (8 | 16 | 32 | 64). If failed, returns 0.
**Example**
```sql
select toInt64OrZero('123123'), toInt8OrZero('123qwe123')
```
```text
┌─toInt64OrZero('123123')─┬─toInt8OrZero('123qwe123')─┐
│ 123123 │ 0 │
└─────────────────────────┴───────────────────────────┘
```
## toInt(8|16|32|64)OrNull
It takes an argument of type String and tries to parse it into Int (8 | 16 | 32 | 64). If failed, returns NULL.
**Example**
```sql
select toInt64OrNull('123123'), toInt8OrNull('123qwe123')
```
```text
┌─toInt64OrNull('123123')─┬─toInt8OrNull('123qwe123')─┐
│ 123123 │ ᴺᵁᴸᴸ │
└─────────────────────────┴───────────────────────────┘
```
## toUInt(8|16|32|64)
Converts an input value to the [UInt](../../data_types/int_uint.md) data type. This function family includes:

28
docs/ru/query_language/functions/type_conversion_functions.md
View File

@ -40,8 +40,36 @@ SELECT toInt64(nan), toInt32(32), toInt16('16'), toInt8(8.8)
## toInt(8|16|32|64)OrZero
Принимает аргумент типа String и пытается его распарсить в Int(8|16|32|64). Если не удалось - возвращает 0.
**Пример**
```sql
select toInt64OrZero('123123'), toInt8OrZero('123qwe123')
```
```text
┌─toInt64OrZero('123123')─┬─toInt8OrZero('123qwe123')─┐
│ 123123 │ 0 │
└─────────────────────────┴───────────────────────────┘
```
## toInt(8|16|32|64)OrNull
Принимает аргумент типа String и пытается его распарсить в Int(8|16|32|64). Если не удалось - возвращает NULL.
**Пример**
```sql
select toInt64OrNull('123123'), toInt8OrNull('123qwe123')
```
```text
┌─toInt64OrNull('123123')─┬─toInt8OrNull('123qwe123')─┐
│ 123123 │ ᴺᵁᴸᴸ │
└─────────────────────────┴───────────────────────────┘
```
## toUInt(8|16|32|64)
Преобраует входное значение к типу [UInt](../../data_types/int_uint.md). Семейство функций включает: